loop every 1 second javascript code example

Example 1: run function every second javascript

setInterval(function(){ 
    //this code runs every second 
}, 1000);

Example 2: run for loop every second js

var time = 1;

var interval = setInterval(function() { 
   if (time <= 3) { 
      alert(time);
      time++;
   }
   else { 
      clearInterval(interval);
   }
}, 5000);